RL Stone CompanyDomestic Hot Water Systems Advances & Concerns in the Hospitality Sector

Presented byChristopher Bove

1-800-836-3690RL Stone Co - Domestic Hot Water

RL Stone Co - Domestic Hot Water

– Good & Friendly Service– Connectivity– Cleanliness– Safety– Predictability

What Do Today’s Guests Want In Your Hotel

RL Stone Co - Domestic Hot Water

- Comfortable Beds- Plentiful Hot Water

Presentation Position StatementInstitutional Hot Water System Design, Operation and Maintenance Must Always Include an Integral Legionella Risk Reduction and Enhanced User Safety Precaution with an Appropriate Ongoing Action Plan.

RL Stone Co - Domestic Hot Water

What is Domestic Hot Water• Potable hot water which is used for drinking, food preparation, sanitation and personal hygiene.• System equipment generally consists of:

– Hot Water Generator– Distribution Piping– Circulation & Booster Pumps– Temperature Control– Point of Use Fixtures

RL Stone Co - Domestic Hot Water

Hot WaterWhen you Want it, Wherever you Want it

Domestic Hot Water System

RL Stone Co - Domestic Hot Water

Owners Concerns• Initial Cost – NSF 61 Energy Cost• Maintenance Cost• Water Cost• Risk Avoidance

– Scalding– Legionella

RL Stone Co - Domestic Hot Water

• New York State DOH Adopts ASHRAE Standard 188-2015 for Cooling Tower Management– No longer voluntary compliance– By 9/17/15 cooling towers need to be registered, inspected, tested and react to findings– By 12/31/15, towers cleaned and certified– By 3/1/16 a plan based on ASHRAE 188-2015 needs to be formalized and implemented

RL Stone Co - Domestic Hot Water

• The bacteria’s natural habitat is WATER• Drinking Legionella bacteria is something we all do, probably every day• It’s breathing moist aerosolized air with Legionella in it that can cause problems• Estimated up to 18,000 hospitalized cases every year. 5-30% are fatal (CDC).• Legionella outbreaks have increased 323% in the last 10 years over the previous 10 (CDC)• NY DOH 2006 Guidelines makes 1 case an outbreakRL Stone Co - Domestic Hot Water

Who Does Legionella Affect

• Smokers• Elderly people• Immunocompromised• People with Respiratory problems• Pneumonia-like Symptoms

RL Stone Co - Domestic Hot Water

Cooling Towers Get The Attention• The name Legionnaires disease comes from a cooling tower outbreak in Philadelphia 1976 at an American Legion conference • Fall River MA 1993• PittsburghVA 2009• Aria Hotel In Las Vegas 2011• Springhill Suites Altamonte Fla 2015• More recently 8/15, in the South Bronx 119 people were infected and 12 died

RL Stone Co - Domestic Hot Water

The Bigger Concern• Domestic Water Systems• CDC Estimates that 80% of the LD cases come from domestic water systems

– 21% Hotels– 23% Healthcare– 56% from all other facilities

RL Stone Co - Domestic Hot Water

We’ve Created Excellent Homes• Plumbing systems are a good environment for harboring and growing Legionella• Legionella will grow between 68F and 122F water temperature• Stagnant or low movement in the water

– Dead legs, aquastat controlled recirculation pumps, hot water storage tanks• Biofilm on plumbing pipe walls protects Legionella Colony

RL Stone Co - Domestic Hot Water

ASHRAE 188-2015 for Potable WaterLegionella: Risk Management for Building Water Systems• ASHRAE 188-2015 says that facilities meeting any one of the following requirements must implement a Water Management Plan WMP

– Multiple Housing units with a central hot water system– More than 10 stories– Housing designated for people over 65– Patients staying more than 24 hours– Whirlpool or Spa– An area housing or treating people with certain medical risk factors….

RL Stone Co - Domestic Hot Water

ASHRAE 188-2015 for Potable WaterLegionella: Risk Management for Building Water Systems• Provides a Framework: Not Specific Control Measures• Each Facility must come up with its Own Control Measures• The ONUS is on you!!!

RL Stone Co - Domestic Hot Water

System Design Best Practices• If water must be stored, it should be at 140F or higher• Minimize dead legs in piping• Avoid stagnant water in system (keep recirculation pumps running)• System temperature is recommended circulate at 140F, and blend before point of use.

RL Stone Co - Domestic Hot Water

What Does a WMP(Water Management Plan) Consist Of• Program Team - Assign a team responsible for program development• Develop water system flow diagrams and schematics• Evaluate where hazardous conditions may occur• Control Measures - Determine where and what control measures should be implemented• Monitor control measures and take corrective actions to maintain limits• Confirmation – Form procedures to confirm the program is being implemented and working• Documentation – Establish procedures to communicate and document activities

RL Stone Co - Domestic Hot Water

Control Measure Options• Hypercholorination

• Ultraviolet Rays• Chlorine Dioxide

• Copper Silver Ionization• Superheat and Flush

RL Stone Co - Domestic Hot Water

Legionella - Your Risk and Exposure• The Law for your Guest: There is no law but if Legionella occurs your are at risk for litigation for personal injury, negligence, medical expenses, lost income, pain, and emotional distress. If your loved one died, your family may have a wrongful death claim.• The Law for your Employees: The law requires employers to provide their employees with safe and healthful workplaces.• In any case Approved Codes of Practice exist (which the do now and recently) they must be followed or you must do more!

– ASHREA– CDC– OSHA RL Stone Co - Domestic Hot Water

Legionella - Your Risk and Exposure• What you must do:• Under general health and safety law, as an employer or person in control of a premises you have health and safety duties and need to take suitable precautions to prevent or control the risk of exposure to legionella. • Details of the specific law that applies can be found in part 1 of Legionnaires’ disease: The control of Legionella bacteria in water systems. Carrying out a risk assessment is your responsibility and will help you to establish any potential risks and implement measures to either eliminate or control risks.• ASHRAE 188 Guidelines

RL Stone Co - Domestic Hot Water

How Can We Achieve Our Legionella Prevention & Business Cost Goals With All These Concerns?

RL Stone Co - Domestic Hot Water

Understand our Typical Daily Water Demand

12 3 6 9 noon 3 6 9 12

1

2

3

4

5

Time in HoursRL Stone Co - Domestic Hot Water

Legionellae and Temperature• Below 68F Legionellae can survive but are dormant• Legionellae growth range (68F - 122F)• Ideal growth range (95F - 115F)• Above 122F Legionellae can survive but do not multiply• At 130F Legionellae die within 5 to 6 hours• At 140F Legionellae die within 32 minutes• At 150F Legionellae die within 2 minutes• Disinfection range (158F - 176F)

RL Stone Co - Domestic Hot Water

Safety IssueSafety Issue

140ºF.140ºF.

RL Stone Co - Domestic Hot Water

Temperature/Time Burn ChartTemperature in F

110°F118°F122°F131°F140°F149°F158°F

Time for 1st degree burn5 hours10 minutes1 minute5 seconds2 seconds1 second -------

RL Stone Co - Domestic Hot Water

What are We Seeing Being Done with Equipment in the DHW Systems in Hospitality Market

RL Stone Co - Domestic Hot Water

Recent Trends in HW Generation– Reduction / Elimination of Tanks– Instantaneous Heaters– High Efficiency Gas Water Heaters

• 1995 normal eff = 83%• 2015 normal eff = 95%+

– Solar Supplement– Packaged Solutions– Many of the Above Qualify for

Utility IncentivesRL Stone Co - Domestic Hot Water

Feed-Forward Steam Instantaneous Water HeaterCompactQuick Reaction to Demand ChangesAccurate & SafeEasy to MaintainEasy to InstallNo External Utilities

RL Stone Co - Domestic Hot Water

Flo Rite Temp

The Brain

BASIS

“Packaged Solution”

RL Stone Co - Domestic Hot Water

Recent Trends in HW Distribution– Properly Sized Pipes: Low Noise, Low Friction, Less Erosion– Insulation– ECM Pumps – up to 75% Energy Savings– Utility $$$– Need to fix

crossovers

RL Stone Co - Domestic Hot Water

Trends We See In Our DHW System• Master Control:

– Digital Mixing Valves• Accurate Control +/- 2F • Extremely Safe• Connectivity• Low Maintenance – Especially with Hard Water

RL Stone Co - Domestic Hot Water

Digital Mixing Valve Thermostatic Mixing Valve

Warranty 5 Years all Components Warranty 1 Year from ship dateDigital readout of setpoint and Outlet Temperature Gauges in mixed outlet Commissioning: Plug the valve in Set low flow and then high flow with and

without pump runningInternally checks itself every 4 Seconds Dependent on nothing in the system changing

from start upBrainScan® true interface with ability to remote Single RTD installed to see the mixed outlet adjust temperature no interaction with valveBrainScan® saves a snapshot to memory every 15 min. No information to suggest it saves information

RL Stone Co - Domestic Hot Water

Remote Set Point Adjustment

PC/BAS Interface

RL Stone Co - Domestic Hot Water

Digital OfferingDRV40 DRV40R

DMC40BS DMC40-40BS

DRV80 DRV80R

DMC80BS DMC80-80-80BS

RL Stone Co - Domestic Hot Water

148.00151.00 153.00147.00

100.00102.00104.00106.00108.00110.00112.00114.00116.00118.00120.00122.00124.00126.00128.00130.00132.00134.00136.00138.00140.00142.00144.00146.00148.00150.00152.00154.00156.00158.00160.00162.00

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1210

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1675

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1954

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2140

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2419

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2698

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2884

Hot Water Temp to DRV80 Cold Water Temp to DRV80Guest Loop Temperature

Before suspected lowered calorific value change in the gas feeding the water heaters.

Readings per hour (BrainScan®) 4Readings per 24 hr. cycle 96Readings since commissioning (est.) 119,808November 18th 2012Internal Checks (DRV80-The Brain®) 15Internal Checks per hour 900Internal Checks per 24 Hr. cycle 21,600Internal Checks per Month 648,000Internal Checks since commissioning 26,956,800Averaged Hot Water Feed Temperature 149.53Averaged Cold Water Feed Temperature 108.90Averaged Mixed Outlet to Guest Loop 122.04Temp Difference in degrees cold/mixed to loop 13.14Total adjustments made to The Brain® 0Total Cost to service The Brain® $0.00 Total cost for repair parts $0.00 Total Days In Operation 1,248Remaining Warranty 577Total operating hours 29,952Commissioned June 19, 2009

Keeping Water Hot, Safe and Comfortable

RL Stone Co - Domestic Hot Water

Case Study – Digital Mixing Valve Performance

• Springhill Suites Columbia, MD 04-06-2015.xlsx

RL Stone Co - Domestic Hot Water

RL Stone CompanyOffices Across New York and New England

www.rl-stone.comChristopher Bove

1-800-836-3690chrisb@rl-stone.com

RL Stone Co - Domestic Hot Water